Limit scheduled workflows to the original repo by default

Fixes https://wurstforum.net/d/1544

Author: Alexander01998

.github/workflows/stale.yml

@@ -11,6 +11,7 @@ permissions:
 
 jobs:
   stale:
+    if: ${{ github.event_name != 'schedule' || github.repository == 'Wurst-Imperium/ChestESP' }}
     runs-on: ubuntu-latest
     steps:
 

.github/workflows/update_modrinth_deps.yml

@@ -7,6 +7,7 @@ on:
 
 jobs:
   update-deps:
+    if: ${{ github.event_name != 'schedule' || github.repository == 'Wurst-Imperium/ChestESP' }}
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false